The work hours argument is insanely retarded.....whats true is that for whatever reason there are very few hardcore 10 man raiding guilds in US. If you want hardcore raiding you go to 25. The vast majority of 10 man guilds are 2-4 day raiding guilds even during progression, which obviously isn't enough to be 14/14 heroic at this point. There are basically no 6-7 day 10 man raiding guilds that I know of in the US but I might be wrong